No special deal (other than a small intro bonus). Per the OP's link, if you stay at a Marriott and choose to earn miles instead of MR points you can now credit those to AA once again and/or you can convert MR points into AA miles. Basically the same as with their other airline partners, it's just that AA dropped out for a few years and are now back.

“Our intention was never to launch a website, our intention was to build a global brand for frequent flyers.”

content + community + technology + social

InsideFlyer was created by travelers, for travelers. Here you can discover and share your experiences related to travel and frequent flyer programs with business travelers, leisure travelers, infrequent flyers and road warriors alike.

InsideFlyer is a privately funded venture based in Colorado Springs, CO (affectionally—the House of Miles). We’re a small diverse group of experienced frequent flyer experts, travel community builders, technologists, and friends of the flyer who want to help you learn to be an expert traveler. We believe that learning about frequent flyer miles should be as fun as travel itself.

Milepoint is now InsideFlyer. “Our intention was never to launch a website, our intention was to build a global brand for frequent flyers.” We’ve got news to share with you. Today we are announcing… Continue Reading